Insulator-supporting structure.



C. L. PEIRCE, JR- INSULATOR'SUPPORTING STRUCTURE.

APPLICATION FILED AUG-B. 1914.

Patented 001. 19, 1915.

WITNESSES nsrris runner ora ion.

CHARLES L. PEIRCE, 3B,, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR OF ONE-HALE 'lQ HUBBARD & (30., 0F PITTSBURGH, PE

SYLVANIA.

Specification of Letters Patent.

NNSYLVANIA, A CURPORATION OF PENN- Patented Set. 119 31915.

Application filed August 8, 1914. Serial No. 855,780.

ments in Insulator-SupportingStructures,

of which the following is a specification.

My invention relates to improvements in insulator supporting structures, particularly insulator supporting brackets.

insulator supports such as brackets have beenformed by casting, but this requires considerable metal and weight in order to get the necessary strength. In order to overcome the defects of cast structures, the structures have been built up from commercial shapes of iron or steel, as for example, channel bar or'angle bar. up of such commercial shapes are, of course, much lighter and at the same time stronger than cast supports, but even when built up of commercial shapes it-is not possible at all times to get just the desired distribution of metal at desired places. Take for exam ple the U-shaped bracket bent from channel bar. If channel bar is used which has the necessary width of web, the flanges would in some cases be too short to give the required stiffness and rigidity against bending in the plane ofthe flanges. if a channel bar 1s chosen in which the flanges are of sutlicient length the webs would be widerthan required and there would be a waste of metal. In other words, where commercial shapes of iron or steel are used, the structure is tied down more or less to fixed commercial dimensions of the stock and the desired distribution of metal and the de sired shape can not always be produced.

One of the important objects of my invention is therefore to form insulator supports, particularly brackets from sheet metal, this permitting any desired distribution of metal and uniformity of strength with the least amount of metal. in other words, certain parts will not have to be made unnecessarily heavy in order to obtain the required strength at other points.

Another object is to form the supports in the least expensive manner, the supports being preferably stamped fron sheet metal and shaped by dies in the manner involving the least number of and least expensive operations. 3

Supports built.

Another advantage of so forming the supports is that the insulator receiving ends can be shaped exactly as desired for directly recelving insulators or for efficiently receiv* ing any desired form of insulator supporting thimble.

The various features of the invention will be clearly understood by reference to the accompanying drawings in which- Figure 1 is a side elevational view of a single bracket, Fig. 2 is a front view thereof, Fig. 3 is a view from plane 3 -3, Fig. 1, and Fi 4% is a sectional View on plane H, Fig. 2. p

Referring to Figs. 1 to a, the bracket shown is formed from a flat piece of sheet metal and comprises a body section 10 of ttshape whose cross section is of inverted U-shape, the crown a. being preferably semicircular and the limbs b and 0 being parallel and of a length at various points sufficient to give the desired strength. At the inner end of the body the vertical Wings 11 and 12 extend laterally and upwardly from the edges of the limbs b and 0 and afiord a base for securing the bracket to a support. The

inner upper section of the body forms trengthening ridge for this base and as shown the end 13 of this section is of re duced height and flattened and provided with a bolt hole 1 Extending from this end section 13 the transverse strengthening ridgesl and 16 are formed in the wings 11 and 12 respectively and have bolt holes 1'? and 18. At the outer end of the body part the sections Z) and 0 of the limbs F) and o are curled inwardly and brought together so that this upper end forms a preferably slightly conical or tapered seat .9 for insulators or for an insulator supporting thimble, a thimble 2, in the form of a wire helix being shown, the ends of this helix extending into the holes 19 and 20 cut in the bracket material.

The above described bracket possesses great strength, particularly in the bend of the body where the bracket will be subsections 15 and 16, is very strong and will hold the insulator rigidly to a support against sag or against lateral swing. The bracket being formed from sheet metal, the outer upper end of the body can be made of true cylindrical or conical shape for accurately seating an insulator or insulator supporting thimble. The bracket has also a very neat and pleasing appearance an is entirely free from sharp corners.

I do not desire to be limited to the exact structures and arrangements herein shown and described as modifications are no doubt possible which would still come within the scope of the invention.

I claim as follows:

1. An insulator supporting bracket stamped entire from a flat piece of sheet metal and comprising a U-shaped body part of U-shaped cross section, wings extending laterally from the inner upper end of the body to form a mounting base for the bracket, and the outer upper end of the body part having the limbs brought together to form a' cylindrical seat for insulator thimbles. 2. An insulator supporting bracket formed entire from a flat piece of sheet metal and comprising a U-shaped body part of U-shaped cross section, the inner upper endof the body being closed, wings extending from the inner upper end forming a supporting base for the bracket, and the outer upper end of the body being shaped to receive insulator thimbles.

3. An insulator supporting bracket formed from a single piece of sheet metal and comprising a flat base part, a U-shaped body part of U-shaped cross-section extending from said base and the outer end of said bent into cylindrical forms to form a support for insulators.

5. An insulator supporting bracket formed entire of sheet metal and comprising a U-shaped body part of U-shaped cross section, the outer end of said body partbeing bent into conical form to provide a seat for insulator supports, wings extending laterally and upwardly from the edges at the inner end of the body, and laterally extending ridges in said wings apertured at their ends for the reception of bolts.

6 An insulator supporting bracket formed integral of sheet metal and comprising a l-shaped body part-of U-shaped cross section, wings extending laterally and .up-

wardly from the edge at the inner end of said body part, the inner end of the body part being closed and depressed, and ridges formed in said wings and extending laterally from said depressed body end, said de-' pressed body end and the ends of the Wings being apertured for the receptionof bolts.

In witness whereof, I have hereunto set my hand this 28th day of July, A. D. 1914.

CHARLES L. PEIRCE, JR.

Witnesses:

RICHARD M. KERSGI-INER, WALTER V. Kmxwoon. 

